Google has announced the winners of its UK Global Impact Challenge.
The winners will now receive £500,000 each to develop their technology, in addition to 10 Samsung Chromebooks and support from Google's employees.
The judging panel selected their top three ideas and the public selected a fourth.
The three ideas chosen by the judges came from Solar Aid, Integrity Action and Apps for Good.
Solar Aid caught the eye of the judges with its solar panels that can be used to deliver low-cost solar lighting to off-grid African communities, thereby removing dependence on kerosene.
Meanwhile, Integrity Action aims to provide an online and mobile platform that allows citizens in conflict zones to report on development projects.
The third winner, Apps for Good, wants to engage young people from poor communities in app creation through an online platform and in-classroom training.
The fourth winner, chosen by the public rather than the judging panel, went to The Zoological Society of London, which is aiming to enhance the protection of endangered wildlife by equipping camera traps with automated sensors.